Submission #788523

#	Time	Username	Problem	Language	Result	Execution time	Memory
788523		aykhn	Combo (IOI18_combo)	C++14	10 / 100	36 ms	452 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

// author: aykhn

using namespace std;

typedef long long ll;

#define TC int t; cin >> t; while (t--) _();
#define OPT ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define all(v) v.begin(), v.end()
#define pii pair<int, int>
#define mpr make_pair
#define eb emplace_back
#define new int32_t
#define pb push_back
#define ts to_string
#define fi first
#define se second
//#define int ll
#define ins insert
#define inf 0x3F3F3F3F
#define infll 0x3F3F3F3F3F3F3F3FLL
#define bpc __builtin_popcount

string guess_sequence(int n)
{
    string ans = "";
    char ch[4] = {'A', 'B', 'X', 'Y'};

    while (ans.length() != n)
    {
        int s = ans.length();
        for (int i = 0; i < 4; i++)
        {
            string nw = ans;
            if (!ans.empty() && ch[i] == ans.back()) continue;
            for (int j = ans.length() + 1; j <= n; j++)
            {
                nw.pb(ch[i]);
            }
            int ns = press(nw);
            if (ns > s)
            {
                for (int j = 1; j <= ns - s; j++)
                {
                    ans.pb(ch[i]);
                }
                break;
            }
        }
    }

    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:32:25: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |     while (ans.length() != n)
      |            ~~~~~~~~~~~~~^~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 95